There is provided embedded light guiding parts that allow for light, signals or live images to appear on its surface. Specifically there is provided a light system having an array of rods made in a hard transparent or translucent polymer material embedded in a building material. The tapered rods are held together by a back-bone that connects the bases of the tapered rods to achieve an evenly distributed array of tapered rods, preferably having the same orientation, wherein the rods are adapted to receive a light input at the base ends and to transmit the light output at the front ends of the rods.